Method for processing ultra-high molecular weight polyethylene fiber spinning stock solution

An ultra-high molecular weight, polyethylene fiber technology, applied in spinning solution preparation and other directions, can solve the problems of increased spinning solution concentration, increased production cost, inability to achieve dissolution, etc., to reduce shear degradation and high temperature degradation, reduce High temperature degradation, the effect of reducing the aspect ratio

Inactive Publication Date: 2020-05-08
长青藤高性能纤维材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses two kinds of solvents to be mixed. After one solvent is removed by flash evaporation, the concentration and viscosity of the spinning solution increase. This high-concentration solution cannot achieve better dissolution when the twin-screw temperature is only 120~200°C. And the process of this method is loaded down with trivial details, increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: 400D ultra-high molecular weight polyethylene fiber spinning stock solution processing method

[0019] Add quantitative mineral oil and PE powder into the material kettle at a ratio of 9:1, heat to 80°C, then add antioxidants, emulsifiers and titanium dioxide, stir evenly, pour into the autoclave, turn on the emulsifier, and fill in Nitrogen, pressure increased to 1.5MPa, emulsified and stirred for 30min~60min, then increased pressure to 3MPa, constant temperature stirred for 60~120min, the temperature was kept at 126°C, and the emulsified speed was set at 4500r / min. The emulsified and swollen solution was injected into the single-screw extruder, the speed of the single-screw extruder was set at 180r / min, and the temperature was 132°C. After the emulsion was extruded by the single-screw extruder, a 400D ultra-high molecular weight polymer was obtained. Vinyl fiber spinning dope.

Embodiment 2

[0020] Embodiment two: 1600D ultra-high molecular weight polyethylene fiber spinning stock solution processing method

[0021] Add quantitative mineral oil and PE powder into the material kettle at a ratio of 9:1, heat to 85°C, then add antioxidants, emulsifiers and titanium dioxide, stir evenly, pour into the autoclave, turn on the emulsifier, and fill in Nitrogen, pressure increased to 1.5MPa, emulsified and stirred for 30min~60min, then increased pressure to 3MPa, constant temperature stirred for 60~120min, the temperature was kept at 126°C, and the emulsified speed was set at 4500r / min. The emulsified and swollen solution was injected into the single-screw extruder, the speed of the single-screw extruder was set at 180r / min, and the temperature was 132°C. After the emulsion was extruded by the single-screw extruder, a 1600D ultra-high molecular weight polymer was obtained. Vinyl fiber spinning dope.

[0022] The UHMWPE fiber spinning dope prepared in the above examples is...

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Abstract

The invention provides a method for processing an ultra-high molecular weight polyethylene fiber spinning stock solution. According to the method for processing the ultra-high molecular weight polyethylene fiber spinning stock solution, the ultra-high molecular weight polyethylene fiber spinning stock solution is processed at high pressure and high temperature, so that the spinning solvent can beimmersed in the ultra-high molecular weight polyethylene powders to shorten the swelling time; and the solution after high-pressure treatment is homogenized by a single screw extruder and further swollen and immersed, therefore, the concentration uniformity of the spinning solution is increased, the spinning temperature is reduced, and the strength and yarn levelness of the spinning of the ultra-high molecular weight polyethylene fiber wet process are improved.

Description

technical field [0001] The invention relates to the field of preparation of ultra-high molecular weight polyethylene fibers, in particular to a processing method for spinning dope of ultra-high molecular weight polyethylene fibers. Background technique [0002] With the rapid development of domestic ultra-high molecular weight polyethylene fibers and the urgent needs of textile, military, labor insurance and other markets, ultra-high molecular weight polyethylene fibers are moving towards high-end markets such as high strength and high wear resistance, and most domestic manufacturers The production process is mainly wet production, which uses mineral oil as the spinning solvent, through twin-screw extrusion, fully dissolves and extrudes under the action of high temperature and strong shear to form jelly filaments. However, ultra-high molecular weight polyethylene has a high degree of macromolecular chain entanglement and is difficult to be completely dissolved by conventiona...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): D01D1/02
CPCD01D1/02
Inventor包剑峰桂方云
Owner长青藤高性能纤维材料有限公司